Crown block



B. S. MINOR u Nov; 24, 1931.

CROWN-BLOCK 4 Sheets-Sheet 1 Filed Sept. 26, 1928 lllar A r-roR/vEy B. s. MINOR- CROWN BLOCK Nov. 24, 1931.

' Filed Sept. 26, 1928 f 4 Sheets-Sheet 2 m@ 'T TOR/VE K Nov. Z4, 1931. v B. s. MINOR 1,833,172

` cRowN BLOCK v Filed Sept. 26, 1928 4 Sheets-Sheet 4 To Calf Wheel To DRAW I4/maks ,BL/RT S. MINOR- oww-d 5 constructions the cable line'sheaveshave been vvpendentlv of its elevation.

"is` untoward conditions many 'manufacturers f threaded injsuchlmannerthatthe fast rotat-v Q5 i i n tically directing thecable-linesileadingthere- "IOWel-Cd @5 have proven anything but leconomicalgin In the drawingshereto annened;l f :f-

jority of casing lineushea'ves;diectlfh tion.-- i

f5-'1 In01111I12`ille` Samefzit being` -planrihat 4.Fig Lldsaidiagrammatic .View illl'1strating5 4o single deck constructions,,an'datthesame "45 ling blocks having sheaves Offdfren-SZCS tratinfrhw'the cbllnS from the pi-Voted, 95

A consumen nemesi-allaite ,sheavesfgare wider; toffeectfthe' desired combatiea Of 1 Patented NOV 24, 193? l ,l ,i i i .Y

" UNTEDfSTPATEiS M y teneis-flanel@ sara;

Thisinvention'pertains mounted single plane, therebyk Areducing structions employedin v connection oil the height of the block, means being provided v Well drilling operations. Y A vfor lining up the sheaves of the crown block Heretofore in earlierftype's of ,crown blook with the sheaves of the travelling block indearranged inasingle vdecker frame. i l,Such i AAffurther, object is-to provide a crowns@ an arrangement was found tobesomevvbat V-lolo'ckconstructie;1 in which thelines leading unsatisfactory owingchieflytto the fact Athat therefrom to thetravelling block willenter it was almost; impossible `to effectively aiv` and leave the varioujssheaves at the minimum i in range or mass the large number ofsheaves angle from the'vertioal. L

now required in modern drilling operatlons -v Astill furthen and 4import-ant object l1s to ff so that the cable lines vleading to the travel- `providea sheave mounting for orovvnblocks ling block Wouldtracl; inamoreinearlyvertiin which the lines leadingtherefrom to the cal direction. In order to counteractsuch travelling block disposed therebelovv can ,.bfei 4 have substituted for-thefsingledeck cIQWIi 4ying sheave'willbedisposed :next tothe 'slowf blocks,` double and even ftripleg, ,deckconsheaveand on one side of;thetravellingblock, structions,'in an endeavor 'to .provideagmolge f in order thatthe block'vvi`ll always assume a compact arrangement fof the sheaves for .ver- -vertical` apositionyvhen thesameis raised or j in '.70 from tothe travellingblock. WhileiSuChiim- Thea oveaand othenobjects ai'e accor n V proved method of Sheaye asserlblfglfze' has plishedbythe construction'herein described, 1 proven extremelysatisfactorynelmiliating a; single embodiment being'shown byway of line and sheave Wear, yet suchconstnuctiQnS illustration-15 Y' f 375 manufacture over the earlier 'singlefdeek on- 1 Fig. lis a side elevation ofthe cro lock A SI'UCOIIS- showing its sheaves connected tothe travel- -In the present invention the gold singledeck ling block therebelovvparts being broken 'constructionis utilized by gropingthefma- `avvayto more clearly disclose the construccenter of the crown vblock"frame, andfthen Fig-2 is a sectionalelevation taken on disposing the-remaining `s'heaves1.(ilf1 this fin- 'line2-2 of Fig. 3 lookingin the direction stance tWo) at-fright anglesto thegroufpjed of thearrowsr, n g- SheaVeS, 011e 011 ejtheslde 1 andwpvptauy Fig. 3 is a plan :View of the crovvnblock,

the sheaves'of the c`0Wn-b1OCk. Wi1-ljliinefllp `theminin'mm angle ofthe cable `lines Athat Wlth the sheaves ,of the-tliave11-1ngp1ock 1n' mav be vattained"betwveen'tlie crovvn andtravdependently of theelevationiosald, block, e111-n o, blksg- L thus correcting allthedisadvantages oiithe Fig. 55S diagrammatic View showingthe 90 movement of the'ni'voted casingsheaves with tn ia-Stnflclgg relation to the sheaves ofthe travelling block 3 i t 1p "rigid structure..v

`having vthefast and slowY sheaves travelling 5 .A l ofj the-convenient"mounting' of'tliepsheave neXtito eachv other;V l f Referring now to the drawings-andfparticularly to Figuresl1,2, and 3, indicates the uprightsof 'theA derrick, connectedl Vtogether'at their upper ends vby the usualcross timbers 11 allTbo'lted togetherfiiii theiiusual manner. l"`Tlne crown block frame or deck "12 is composed in this instance of steel'ohznmel-v and YI-'beams all boltedgtoigether, tofxfolgm a -l 28,29, itwill'be apparent that they cable lines as, ruiming therefrom to the travelling block will These beam members v preferably jconsiSt of-I-beams 13, 14, and channel beams 15, 1G,

disposed in parallel relationa'ndspacedap art? suitable distances from each otherto permit wheels ltherebet,Ween."V Botli ends 'fof' these 'beamsaregseeured togetherby means of'bolts Y 17, l'18,' and separating plates;K 19h20.." 'Se is secured "in any" suitable-manner a-'plnrality of sheave bearing or`s'trap"'plates23,111 which 'are rotatablymounted anumber'of theel-own Thev arrangement of'the grouped sheaves u `rinythis constructionisexactlysimilarftotlie arrangement 'ofi sheavesL ini travelling block con structionv for" which'- Iwas- 'granted f lng undue' 'or'l excessive wearf on the linges-and y5192651"In'xsaid patentedl "constrnction the "sheaves" are rigidly vmounted''on 1 independent pins and rotate in antifriction bearingslgjtlie "construction'vbeingf so arranged1"that Athe sheaves".V may be grouped? so c'loselytogetfher that 'theeable lines-leading `therefronr to ftlie crown blok thereabove wouldv trackf'inl a more nearly vvertical{direction,-'tluselimiiiaty slieavesdu'ringtheir operation. x

sheaves are ofA`- gre'ateinumbentli'afn's :the sheaves of the travelling block above referred sheavesi iniaf different formation to accomplish the desired results as setffonthrir'my I Y y patentedconstruction; vand .to the accom @lien ment" offthis end, four-'of the? sheaves: 25,

26, and "271, VAas,heretofore noted; farevmounted The two remainingcasinglsheaves 28, V29,.

are; arranged? alongside the n outer faces 'of A'I beams 21, 22,-.' at1substantially' right angles yto the4 grouped casing sheaves. l llhesesheaves are' moiinted! :bearingstructures, eaclrjof which preierably.; consists 'ofr g pair fof .ver-

' tioally" .disposed bearingv standards `30; 31, 'bolte I i Y of* the` LbeamsV 13, 14. Pivotally-"moulrlted `ttheir lower ends to the' uone'rflanges inthe upper ends of these standardsis abar 32Yhaving cylindrical end pins. Bolted to the side fates ofbar 32 are downwardly de- "i pending vplates 33, their lower ends having spacing bars therebetween, bolts 34 securing their'end's in rigid relation. Mounted in grouped sheaves heretofore described.

By pvotallyimounting the casing sheaves line up with Jthe sheavesof 'said travelling ly shownri'n Figure 5 ofthe drawings.

' mentof theeasingfslieaves'ltlielines from 'the tlire'adediii "suchf manner that the-fast'rotateaeliipairyofplates arejdth casing' sheaves 1 28, 29,m'ounted' in the same manner as the 70 e 1S f blockxindependentlyfof vits elevation as elear-Vv i (selgign 7)1,fthaisfenablingthe1 travelling VKblbckfto assumezasubstanti'allyi'verticalposii {ltmted bearingjstmdards 54.55, seeured to Hthe upper suirfaries of the'ianges sofjohann'elV j' to* frames-214111112 w-lch'iis rotatably mounted? a sand-l linesshe'avef 4:19?? :over "whiehf Ypasses the cabl'felrsand lineVZ 50. from theis'an'di "reelf on thefde nectnfvvitliithe* op'eraftionofi swabbin'g' and similartoo ls "mountedfone'on=either side ofsfsaidformation lV *ofthe2 travellingz blockv fcanzbev mounted; next Y f In* crown fblo'ck@` constructions 1 heretofore tbthefslbwimovingcasing sheave, thus enabling me to counteract the differenceA in` tion between.' theftwo' rotating she ailes hat 'ffpermits'stietnavellingrblocleto -al'waysfmainy diameters.

tain a nearly vertical position when it is A raised or lowered ,in `drilling operations. I This manner of threading the lines from the crownto the travelling block is considered an extremely important feature of the invention M disclosed herein. 4 Y

In the present invention as illustrated the Y. crown block is shown `with six casing line sheaves mounted therein, Vwhile the travelling i block therebelow has five operating casing f line sheaves, the manner of threading from' the crown to the travelling blocks being as follows: k From the draw works 52 the main operating cable 5l passes upwardly and around sheave 24 of the crown block, vthence down: wardly to sheave -B- of the travelling j block, and thence upwardly over sheave 25 of the crown, downwardly to sheave `C of the block, again upwardly over sheave 26 of the crown and thence downwardly to sheave -f -D of the block, upwardly to sheave 27 of the crown and thence downwardly to sheave -E- of the block, upwardly to sheave`28 of the crown and downwardly to the opposite .eide and around Isheave A;- of the block,`

-then upwardly and around sheavey29 of the crown block and thence downwardly to the calf wheel (not shown) where it is made fast.

In Figure 4 is illustrated a diagram showing the minimum angle of the cable lines that may be attained between the crown and` travelling blocks.

Figure 5 illustrates' diagrammatically the positions assumed by the pivoting sheave's28 and 29 during the operation of the 'travelling block in hoistingand lowering operations. In this figure the angle assumed by the pivoting` sheaves 28 and "2Q-when the; travelling block is raised is shown in dotted lines. y

Figure 6 illustratesdiagrammatically the positions assumed bythe pivoting sheaves 28 and 29 when used in combination-'with travelling blocks having sheaves of different From the above description it will be clearlyapparentthat I have embodied in a single deck crown block'construction all the valuable and desirable features that are now only attainable by means of double or triple deck constructions, thus eliminating undue eX and a pair of casing sheaves pivotally mount.- Y

ed in said frame.

2. In a crown block construction for well derricks. a frame, a plurality of casing sheaves disposed in substantially the center of i 3': In `a crown block-construction tion, and a pairof pivoted leasing sheaves mounted; insaid frame onej'at eitherv end :ofA saldi4 luralityfof sheaves 'and-1 rotating.: at sub'- :stantially-rightangles thereto. F f

derricks arfframefa plurality of@ sheaves Imounted ong said-iframe,aduother sheaves rotatably Lmounted gin'- Abea-ring frames,` `said! .framesbeingpivotally lmounted in bearings ,l

secured tothe frameof the crown block.

f 4. Af'crown block'cons'truction foriwell derricks comprising a'fframe,-faiplurality of casing @sheaves.mountedf on. said frame in 1 fgrouped'formation, and other casing sheaves fswingingly fmountedbzin said V"frame i and `in angular-relation tosaid 'grouped sheaves. 'l

fjkf. 1 A=fcr`own blockiconstruetionfor well der-` s comprising L av frame, a plurality of casing sheaves mounted lin grouped formation,

-thj'ejfastl linesheavefofithe group mounted Y alongsidetlie slow line sheave, a pair of casiing sheaves tiltingly mounted at an angle to the grouped sheaves, and a sandline and aV cat line sheave mounted 1n said frame one on either side of the grouped sheaves.

- 6. The combination with a travellinglblocli,

offra crown block construction ,of the `single decktype comprising a plurality of grouped ycasing sheavesLand a pair vof casing sheaves mounted on said deck tooscillate during the operation of the cable lines thereover, the fast Y rotating sheave of the travelling block being y disposed next tothe slow sheave andon one" side ofthe travelling block, whereby the cable lines 'from the crown block to the travelling block may be threaded so .that said travelling y block will always assumera verticalposition when raised or lowered.'

` In a crown block constructionv for oil .well derricks, the combination withl a travelling block, of a crown block frame disposed thereabove, a plurality of casing sheaves ro-v tatably mounted in ,grouped formation in said crownblock frame,.a plurality of bearings arranged in pairs secured to the upper Y jportlon `of sald crown blockframe,.and a 11o I, fr Y sheave mounted to oscillate in each'of Vsaid Y bearings with their axes disposed substantially at rightangles to Vthe axes of the..

grouped sheaves.

8. In acrown blockconstruction for oil derricks, the combination of a Vsingle deck frame, a plurality oit"` sheaves rotatably mounted in the frame, a plurality of bearings" ,arranged in Vpairs mounted on said frame, a

sheave Vpivotally. supported by` each pair of the bearings withtheir axes vdisposed substan?l tially at Aright angles to, theV axes'of said first v i y l' i 125 9. In aV crownblock- "construction vforoil well derricks,the combination with a travelf! ling block, of a crown block l,frame disposed I f thereabove,a plurality of casingsheavesrof vtatably vmounted in groupedformation named sheaves. 

